Edwin burhorn



(N o Model.)

B. BURHORN.

FILTER.

No. 457,025. Patented Aug. 4, 1891.

mi "0M5 PEYERS cm, Puma-mum, WASHINGTONLW c UNITED STATES PATENT OFFICE.

BARTON H. COFFEY,

OF NEY'V' YORK, N. Y.

FILTER.

SPECIFICATION forming part of Letters Patent No. 457,025, dated August4, 1891.

Serial No. 307,022. (No model.)

To all whom it may concern:

Be it known that I, EDWIN BURHORN, of the cityand countyof Philadelphia,State of Pennsylvania, have invented a new and useful Filter-Valve, ofwhich the following is a true and exact description, reference being hadto the accompanying drawings, which form a part of this specification.

My invention relates to the construction of a valve for governing theflow of water through a filter and enabling the current to be reversedand the filter cleaned at will, my object being to provide a valveespecially fittedfor this use and which can be easily operated and withlittle tendency to get out of order.

My device will be best understood after a description of the drawings,and its novel fea tures are hereinafter clearly set forth in the claims.

In the drawings, Figure l is a sectional elevation through a filterhaving my improved valve. Fig. 2 is a plan view of said filter; andFigs. 3, 4, and 5, plan views of the valve in place on its seat, withits upper projecting dome cut away. Fig. 6 is a perspective view, partlyin section, of the flat-faced valve.

A is the valve-seat, having a flat face, in which four conduit-passagesa a a a are formed at equal distances from the center about which thevalve turns and at four angles of a heptagon described around saidcenter. The passages or ports a a are at adjacent angles and the ports aa at alternate angles from the nearest ports and from each other. Thisvalve-seat A is preferably secured, as shown, upon the top of thefiltercasing J, which is divided by a partition f into a filter-chamberG and a settling or reservoir chamber F, the two chambers beingconnected by pipes I I, &c., which pass through the partition f andterminate near the bottom of the filter-chamber G, having openings attheir lower ends, through which the water can enter them. Thisparticular construction is shown, not because it is of the essence of myinvention, but simply as an illustration of a filter to which myinvention is applicable. One of the ports in valve-seat A a is connected with the filter-chamber in the drawings by means of a pipe H,having a T at its end, through the openings h h of which the waterenters the chamber. Another port a is connected with the delivery end ofthe filter as shown, the reservoir F. A third port a leads to waste, andthe fourth a to the delivery-main. (Not shown.)

B is the valve, having a flat face to fit on the valve-seat A andarranged to have a rotary motion upon the center, around which the portsare grouped. A portion B of the valve is formed into a hollow dome, onone side of which extends'the flat flange B which should have an outlinebounded by a circular are described from the center-of the valve, whilethe other side of the valve is recessed, as shown--that is, does notextend beyond the dome, which is of the wedge shape shown, one end beinglarge enough to extend over one port without covering ports situated atalternate angles of the heptagon, while the other end is large enough tocover two adjoining ports, as shown,the length of the dome beingsufificient to include within it ports on opposite sides. i

O is the valve-casing, in which is formed an entrance-port c for water,and at the top of which a stuffing-box E is preferably provided to giveexit to a valve-rod D, by which 1 prefer to actuate the valve B.

D is a lever for moving the valve.

The operation of my valve is as follows: Then the valve is in theposition shown in Fig. 3, the water entering through 0 passes out ofchamber 0 through port a to the filter, and, returning, enters the domeof the valve through port a, passing out through port a to thedelivery-main, the port a being covered and closed by flange 13 Toreverse the current of water to clean the filter, the valve is moved tothe position shown in Fig. 4E. The water entering chamber 0 then passesinto the normal delivery end of the filter through port a, returningenters the dome of the valve through port a, and passes out through porta to waste, the delivery-port a being closed by flange When the filterhas been sufficiently cleaned, the valve is turned to the position shownin Fig. 5, the water now again passing through port a into the filter,

and, returning, enters the valve-dome through a, but still passing outthrough the wasteopening a and the port a being still covered by flange13 This last position of the valve is maintained until the unfilteredwater in the filter has been washed out and the valve then againreturned to its normal position, as shown in Fig. 3. The three positionsof the lever D are indicated in Fig. 2 and by the dotted lines in Figs.3, 4, and 5.

I am aware that in Hayness patent, No. 282,313, a flat valve-seat isshown with perforations formed in it and in combination with adouble-domed valve having a closing-flange and an opening to permitconnection between a perforation and the valve-chamber. In this device,however, 'the dome is situated on the edge of the valve, while my singledome extends across the valve, and is thus enabled to make connectionsbetween perforations in the valve-seat which cannot be made by theHaynes construction. The important adj ustment for filtering to Waste,for instance, cannot be made by the Haynes valve.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent,- is- 1. The combination, with a filtering-tankprovided with a pipe for conveying water to be filtered to thefilter-bed, of a valve-casing with an inlet-pipe, a waste-pipe, and apurewater-discharge pipe, a circular valve-seat having four ports, oneport communicating with the first-mentioned pipe, one port communicatingwith the filter-bed, one port communicating with thepure-water-discharge pipe, and one port communicating with thewaste-water-discharge pipe, and a rotating valve having a cup portion toprovide communication between two of said ports, and a portcommunicating with either of the two remainin g ports, said ports in thevalves and seat being arranged so that water passing through the filterin either direction may be discharged therefrom into the waste-pipe andso that filtered water may also be discharged from the filter to thepure-water-discharge pipe.

2. A valve for a filter, having in combination a flat seat A, withconduits at a a a leading into it and opening on its flat face, asdescribed, a valve 13, having a fiat face, a cavity B, formed thereinand extending across the valve, a flange B on one side of said cavityand a recess on the other side, and a valvecasing 0, having a passage 0formed in it, all substantially as and for the purpose specified.

3. A valve for a filter, having in combination a flat seat A, withconduits a a a a leading into it and opening on its flat face, asdescribed, a valve B, having a flat face, a cavity B, formed therein soas to extend across the valve, a flange B? on one side of said cavityand a recess on the other side, avalve-spindle D, secured to the top ofvalve 13 and extending through the valve-casing, and a valvecasing 0,having a passage 0 formed in it, all substantially as and for thepurpose specified.

EDWIN BURHORN. Witnesses:

Lnwrs R. DICK, FRANCIS T. CHAMBERS.

